JP2010112114A - Drainage facility - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drainage facility with simpler components in shape and allowing a drain riser to be easily renovated. <P>SOLUTION: This drainage facility includes exchangeable connection constitution in which socket is provided at the end of one tubular structure out of two tubular structures connected at an upper end or axial intermediate position, connected to an upper floor drain pipe joint, of the drain riser 50, and insertion connection is held in a deeper insertable state of the socket and other tubular structure so that the drain riser 50 is removably connected by inserting the other tubular structure further deep into the socket. A receiving part 36 supporting the lower end face of the drain riser 50 is formed at an inner part of an upper socket 34 of a lower floor drain pipe joint 30 to which the lower end 59 of the drain riser 50 is insert-connected, and an elastic body 38 is interposed between the receiving part 36 and the drain riser 50. An annular packing 35 which is a separate member from the elastic body 38 is interposed between the inner peripheral surface of the upper socket 34 and the outer peripheral surface of the drain riser 50. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a drainage facility. More specifically, a drainage pipe joint that passes through a concrete slab separating the upper floor and the lower floor and is fixed to each floor, and a drainage stand piped between the upper floor drainage pipe joint and the lower floor drainage pipe joint. The present invention relates to a drainage facility including a pipe.

  This type of drainage facility is disclosed, for example, in Patent Document 1 below related to the present inventors. In the drainage facility described in Patent Document 1, the lower end straight pipe portion of the drainage pipe joint on the upper floor is inserted and connected to the upper receiving port of the drainage stack, and the inserted and connected state is displaced upward. It is held in a state that can be made to. The drainage pipe joint is a so-called two-body type, and a lower body fixed to a concrete slab and an upper body having an upper receiving port into which a lower end of a drainage stack is inserted are releasably connected. According to this drainage facility, it is possible to remove the drainage from the drainage system by releasing the connection between the upper body and the lower body and displacing the drainage stack and the upper body together and then moving obliquely downward. It has become. According to this drainage facility, the drainage stack can be removed and updated without cutting.

  By the way, conventionally, the cylindrical one-touch packing as described in the following patent document 2 was attached to the upper receiving port of the drainage pipe joint into which the lower end of the drainage stack is inserted. The packing described in Patent Document 2 includes a seal piece formed so as to gradually decrease in diameter from the mouth of the cylindrical main body toward the back, and the seal piece is pressed against the outer peripheral surface of the drainage stack. By doing so, the upper receptacle and the drainage stack are connected in a watertight manner. A buffer portion having a U-shaped cross section is formed at the back of the cylindrical main body portion of the packing, and the buffer portion is interposed between the lower end surface of the drainage stack and the stepped portion of the upper receiving port. The This one-touch packing has not only a watertight connection by the seal piece, but also a function of absorbing the expansion and contraction of the drainage standpipe that is temporarily heated by the drainage during use.

JP 2008-180056 A JP 2000-74273 A

  As a result of earnestly examining a drainage facility that can easily update the drainage standpipe, the present inventor can easily update the shape of the structural member applied to the upper receiving port of the drainage pipe joint while being simpler. The present inventors came up with the idea of drainage equipment.

  That is, the problem to be solved by the present invention is to provide a drainage facility in which the shape of the constituent members is simpler and the drainage stack can be easily updated.

The present invention takes the following means in order to solve the above problems.
1st invention penetrated the concrete slab which divides an upper floor and a lower floor, and was piped between the drainage pipe joint fixed to each floor, and the drainage pipe joint of an upper floor, and the drainage pipe joint of a lower floor A drainage facility comprising a drainage standpipe, wherein the drainage standpipe has a lower end inserted and connected to an upper receiving port formed in an upper part of the drainage pipe joint on the lower floor, and the drainage pipe joint on the upper floor An exchangeable connection configuration for communicatively connecting two tubular structures connected at an upper end or an axially intermediate position, wherein the exchangeable connection configuration is one of the two tubular structures to be connected A receiving opening is provided at the end of the tubular structure, and the insertion connection is maintained in a state where the receiving opening and the other tubular structure can be inserted deeper, and the receiving opening is inserted deeper into the other tubular structure. The drainage stand by And a receiving portion that supports the lower end surface of the drainage stack is formed at the back of the upper receiving port of the drainage pipe joint. Between the receiving part and the drainage stack, An elastic body is interposed, an annular packing is interposed between the inner peripheral surface of the upper receptacle and the outer peripheral surface of the drainage stack, and the elastic body and the annular packing are separate members. It is a drainage facility characterized by

In the present invention, the upper floor and the lower floor indicate a relative positional relationship between two consecutive hierarchies, the upper floor means the upper hierarchy of the two consecutive hierarchies, and the lower floor is the continuous It means the lower layer of the two layers, that is, the layer immediately below the upper floor.
According to the drainage facility of the first invention, the annular packing for watertightly connecting the upper receiving port of the drainage pipe joint and the drainage stack is provided between the receiving part provided in the upper receiving port of the drainage pipe joint and the drainage stack. It is formed as a separate member from the elastic body interposed in the ring, and it is possible to make the annular packing into a simpler shape. Further, in this drainage facility, the exchangeable connection in which the insertion connection is maintained in a state in which the receiving port provided in one tubular structure and the other tubular structure can be inserted deeper among the two tubular structures to be connected. It has a configuration. In the present invention, “exchange” means that a receiving port is provided at the end of one of the two tubular structures to be connected, and the receiving port and the end of the other tubular structure can be inserted deeper. In this state, the receiving port is inserted deeper into the other annular structure. That is, one annular structure or the other annular structure is relatively displaced so that the other annular structure is inserted deeper into the receiving port. The two annular structures for which the exchangeable connection configuration is set are, for example, connections in a drainage stack assembly formed by connecting a lower end straight pipe portion of a drainage pipe joint and a drainage stack, or two or more pipes. Including pipes and tubes. Since the exchangeable connection structure can absorb the expansion and contraction of the drainage stack at the time of use, the elastic body can have a simpler shape without considering the expansion and contraction absorption of the drainage stack.

  2nd invention is the drainage equipment as described in said 1st invention, Comprising: The said annular packing is an O-ring, and is hold | maintained at the groove part formed in the internal peripheral surface of the upper receiving port of the said drainage pipe joint. It is a drainage facility characterized by this.

  According to the drainage facility of the second invention, an existing O-ring can be used as the annular packing. In addition, even if the O-ring has a relatively small contact area with the outer peripheral surface of the drainage standpipe, the upper receiving port and the drainage standpipe can be kept watertight and hardly adhere to the outer peripheral surface of the drainage standpipe. For this reason, the drainage stack is easily pulled out from the upper receiving port.

According to the drainage facility of the first aspect of the invention, the shape of the structural member applied to the upper receiving port of the drainage pipe joint is simpler, and the drainage stack can be easily updated.
According to the drainage facility of the second invention, the drainage stack can be more easily updated.

[Embodiment 1]
A first embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1 (A), the drainage equipment 11 according to the present embodiment is mainly composed of drainage pipe joints 20 and 30 and a drainage stack assembly 50. First, each member which comprises this drainage equipment 11 is demonstrated.

<About drain pipe joints 20 and 30>
The drainage pipe joints 20 and 30 are installed on each floor through a concrete slab CS that partitions each level of a building having a plurality of layers. In the description of the present embodiment, the three consecutive hierarchies are referred to as hierarchy A, hierarchy B, and hierarchy C from the top in order to facilitate understanding. In this embodiment, the drainage pipe joint 20 is installed in the level A, and the drainage pipe joint 30 is installed in the level B. Since the drainage pipe joints 20 and 30 are different only in the installed level and the configuration is the same, each part is indicated by the same symbol in the figure, and here, the drainage pipe joint 30 installed in the level B is taken up. This will be described in detail.
The drainage pipe joint 30 is made of, for example, cast iron, and the drainage flowing down the drainage stack assembly 50 piped to the level B and the drainage guided by the side branch pipe 48 are merged to form the level C below the level B. This is a joint that flows into the drainage stack assembly 51. The drainage pipe joint 30 is fixed by backfill mortar Mr in a state where the body portion 32 is passed through the through hole CH of the concrete slab CS, and is also supported by a joint support bracket 31 erected on the concrete slab CS. Yes.

  The trunk portion 32 of the drainage pipe joint 30 is formed by continuously forming a substantially cylindrical trunk main body 32a and a tapered reduced diameter portion 32b in order from the top. A lateral branch pipe receiving port 32y to which the lateral branch pipe 48 is connected is provided at a position protruding from the upper surface of the concrete slab CS of the trunk body 32a, and a straight tubular lower end (lower end) of the drainage stack assembly 50 is provided at the upper end. An upper receiving opening 34 into which an insertion opening 59 is inserted and connected is formed. Two smooth blades 32g intersecting each other across the trunk main body 32a and the taper-reduced diameter portion 32b on the mutually opposing inner peripheral surfaces of the portion buried in the concrete slab CS of the trunk portion 32 (see FIG. 3), and the drainage flowing down by the cooperative action of the two blades 32g can be dropped while being decelerated and swiveled. A straight tubular lower end straight pipe portion 40 extends from the lower end of the tapered diameter reducing portion 32b. The lower end straight pipe portion 40 is suspended from the concrete slab CS, and is connected to the upper receptacle 62 of the drainage stack assembly 51 piped to the level C immediately below in the exchangeable connection configuration described in detail later. Has been.

  As shown in FIG. 2, a receptacle that can restrict further insertion of the lower end insertion port 59 into the inner portion of the upper receiving port 34 to which the lower end insertion port 59 of the drainage stack assembly 50 is inserted and connected. A portion 36 is formed. The receiving portion 36 is not allowed to pass through the lower end insertion port 59, but is formed so as to protrude inward of the pipe so as not to interfere with the flow of drainage flowing down the drainage stack assembly 50. An annular elastic body 38 having a substantially rectangular cross section is placed on the upper surface of the receiving portion 36, that is, the surface facing the lower end insertion port 59. The lower end insertion port 59 is inserted and connected to the upper receiving port 34 in a state where the lower end insertion port 59 is in contact with the receiving part 36 through the elastic body 38. A shallow groove 37 is formed along the circumferential direction on the inner peripheral surface along the upper surface of the receiving portion 36 on which the elastic body 38 of the upper receiving port 34 is mounted, so that a space for mounting the elastic body 38 is secured. Yes. The elastic body 38 of the present embodiment is made of rubber, for example, and has a flange portion 38b formed along the radial direction with a space in the circumferential direction on the lower surface of the solid portion 38a having a rectangular cross section. The drainage stack assembly 50 is inserted into the upper receiving port 34 of the drainage pipe joint 30 whose lower end insertion port 59 is fixed to the concrete slab CS, and abuts against the receiving portion 36 of the upper receiving port 34 through an elastic body 38 by its own weight. This state is maintained and the axial positioning is performed. A groove 34m is formed along the circumferential direction on the inner peripheral surface near the opening of the upper receiving port 34, and an O-ring 35 is fitted and held in the groove 34m. The O-ring 35 contacts the outer peripheral surface of the lower end insertion port 59 of the drainage stack assembly 50, so that the lower end insertion port 59 and the upper receiving port 34 of the drainage pipe joint 30 are connected in a watertight manner. Thus, the O-ring 35 and the elastic body 38 are formed as separate members.

<About the drainage stack assembly 50>
In the present embodiment, a drainage stack assembly 50 formed by assembling a plurality of constituent members is used as a drainage stack. Since the structures of the drainage stack assemblies 50 and 51 piped to each level are the same, the respective parts are denoted by the same reference numerals in the drawing, and here, the drainage stack assemblies 50 piped to the level B are taken up. I will explain.
As shown in FIG. 1 (A), the drainage stack assembly 50 is roughly composed of a straight tubular stack main body 54 and a receiving socket 60 that constitutes an upper receiving port 62. And the receptacle socket 60 are connected so as to be disengageable.
The standpipe main body 54 has a so-called fireproof double-layer pipe specification. In the present embodiment, two refractory double-layer pipes, a first riser pipe 56 and a second riser pipe 58, are coaxially connected via a socket portion 57 to constitute a riser pipe body 54. The fire-resistant double-layered pipe has a configuration in which, for example, the outer surface of a resin-made inner pipe made of hard vinyl chloride or the like is covered with a fire-resistant layer such as a fiber reinforced mortar (a mortar mixed with a non-combustible material and fibers). As shown in FIG. 2, the lower end of the riser body 54 (the lower end of the second riser 58) is exposed without the inner pipe 58n being covered with the refractory layer 58t to form a lower end insertion port 59, The drain pipe joint 30 is inserted and connected to the upper receiving port 34. Further, as shown in FIG. 3, the upper end of the riser main body 54 (the upper end of the first riser 56 is exposed without the inner pipe 56n being covered with the refractory layer 56t to form an upper end insertion port 55. The receiving socket 60 is connected.

The receptacle socket 60 is made of cast iron, and as shown in FIG. 3, the receptacle socket 60 is formed in a barrel shape in which the central portion in the axial direction has the largest diameter. The receptacle socket 60 includes an upper end ring portion 64, a downwardly expanded portion 65, a large-diameter cylindrical portion 66, an upwardly expanded portion 67, and a lower connection mechanism 70 in order from the top.
The upper end ring portion 64, the downwardly expanded portion 65, and the large diameter cylindrical portion 66 have substantially the same outer dimensions. The upper end ring portion 64 has a sealing groove 64m having a square cross section formed along the circumferential direction on the inner peripheral surface. An O-ring 63 is fitted into the seal groove 64m and is held at a position protruding inward from the inner diameter of the large-diameter cylindrical portion 66.
The downward expanded portion 65 located below the upper end ring portion 64 is thinned toward the large-diameter cylindrical portion 66 located below the upper ring portion 64, and a tapered surface 65t is formed in which the inner peripheral surface expands downward. Has been.
The large-diameter cylindrical portion 66 located on the lower side of the downward expanding portion 65 is formed in a cylindrical shape. At the lower end of the large-diameter cylindrical portion 66, an upward expanding portion 67 is formed which decreases in diameter downward, in other words, expands upward. The upward expanding portion 67 is formed with a thickness dimension substantially equal to that of the large diameter cylindrical portion 66. The upper end ring portion 64, the downwardly expanded portion 65, the large-diameter cylindrical portion 66, and the upwardly expanded portion 67 constitute the upper receiving port 62.

  The lower connection mechanism 70 located on the lower side of the upward expanding portion 67 is a mechanism for connecting the receiving socket 60 to the straight tubular upper end insertion port 55 of the standing tube main body 54. In the present embodiment, so-called mechanical connection. Takes the form of The lower connection mechanism 70 includes a receiving flange portion 72 including a straight tube receiving port 71, a ring-shaped pressing flange portion 73, a seal ring 74, and bolts and nuts 75 that connect both flange portions 72 and 73. The seal ring 74 is configured to be sandwiched between the pressing surfaces of both the flange portions 72 and 73, and can be deformed inward in the radial direction when the bolts and nuts 75 are tightened and the both flange portions 72 and 73 approach each other. It is configured. Therefore, as shown in FIG. 3, the bolt / nut 75 is inserted in a state in which the upper end insertion port 55 of the vertical tube main body 54 is inserted into the straight tube receiving port 71 of the receiving port flange portion 72 through the holding flange portion 73 and the seal ring 74. As a result, the seal ring 74 is brought into pressure contact with the outer peripheral surface of the upper end insertion port 55 of the riser main body 54, the receptacle socket 60 and the standpipe main body 54 are connected in a watertight state, and the drainage stand assembly 50 is constructed. Has been.

<Connection between the drainage stack assembly 50 and the drainage pipe joint 20 on the upper floor>
The connection configuration between the drainage stack assembly 50 piped in the level B and the drainage pipe joint 20 disposed in the level A which is the level above the level B is an exchangeable connection configuration. That is, the drainage stack assembly 50 corresponds to “one tubular structure” of the present invention, and the lower straight pipe portion 40 of the drainage pipe joint 20 corresponds to “the other tubular structure” of the present invention. As shown in FIG. 3, the drainage stack assembly 50 piped in the level B and the drainage pipe joint 20 installed in the level A in the upper level are connected to the upper receiving port 62 in a connection state during normal use. Is inserted into the lower end straight pipe portion 40 of the drainage pipe joint 20, and the connection is maintained in a state where a room (insertion room) E that can be inserted deeper is left. In the present embodiment, the maximum dimension (maximum squeezable dimension) Nmax of the lower straight pipe portion 40 that the upper receiving port 62 can squeeze is 130 mm. However, the dimension (squeezing dimension) N in which the upper receiving port 62 swallows the lower straight pipe portion 40 is 70 mm. In other words, the connection state is maintained in a state where the lower end straight pipe portion 40 is inserted into the upper receiving port 62 by 70 mm. That is, the lower end straight pipe portion 40 is inserted and connected to the upper receiving port 62 in a state where the insertion margin E remains for {maximum squeezable dimension Nmax (130 mm) −squeezing dimension N (70 mm) = 60 mm}.

  In the connection state at the time of normal use, the squeezing dimension N is necessary for reliably connecting at least the lower end straight pipe portion 40 of the drainage pipe joint 20 and the upper receiving port 62 of the drainage stack assembly 50 in a watertight state. Secure dimensions. When the upper receiving port 62 of the drainage stack assembly 50 is inserted and connected to the lower end straight pipe portion 40 of the drain pipe joint 20, the O-ring 63 held in the seal groove 64 m of the upper receiving port 62 is pressed against the lower end straight pipe portion 40. By doing so, the upper receiving port 62 and the lower end straight pipe part 40 are maintained watertight. The length d from the upper end of the upper receiving port 62 to the center line of the seal groove 64m is 10 mm, and the minimum insertion dimension required to securely connect the upper receiving port 62 and the lower end straight pipe portion 40 in a watertight state is 50 mm. It is. In the present embodiment, a margin of 20 mm is added to the necessary penetration dimension (50 mm), and the penetration dimension N is set to 70 mm.

  In the connection state during normal use, the insertion space E has at least a dimension that allows the drainage stack assembly 50 to be exchanged and removed. In the present embodiment, “exchange and remove” means that the drainage stack assembly 50 is displaced upward and the lower end is inserted from the upper receiving port 34 of the drainage pipe joint 30 of the level B as shown in FIG. This means that the port 59 is pulled out and then displaced obliquely downward, and the upper receiving port 62 is pulled out from the lower end straight pipe portion 40 of the drainage pipe joint 20 of the level A. In this embodiment, as shown in FIG. 2, the depth D (the stagnation depth) D at which the upper receiving port 34 of the drainage pipe joint 30 squeezes the lower end insertion port 59 of the drainage stack assembly 50 is 50 mm. Therefore, when the drainage stack assembly 50 is displaced upward by the swallowing depth D (50 mm), the upper receiving port 62 moves relative to the drainage pipe joint 20 of the level A while swallowing the lower straight pipe portion 40, and the lower end. The insertion port 59 is pulled out from the upper receiving port 34 of the drainage pipe joint 30 of the level B. Further, by further displacing the drainage stack assembly 50 upward, it is possible to provide a gap (cutting allowance) K between the lower end insertion port 59 and the upper receiving port 34 of the drainage pipe joint 30 of the level B. For example, if the total length L of the drainage stack assembly 50 is 2470 mm, the drainage stack assembly 50 can be displaced downward by tilting about 4 ° if the clearance K is secured by at least 6 mm (minimum clearance K1). Can be removed. The insertion space E is set to the minimum value of the cut-off allowance K (minimum undercut allowance K1 = 6 mm) that allows the drainage stack assembly 50 to move obliquely downward to the penetration depth D (50 mm) of the upper receiving port 34. It is ensured to be equal to or greater than the added value. In the present embodiment, the insertion margin E is 60 mm, and it is possible to secure a clearance K of {insertion margin E (60 mm)-squeezing depth D (50 mm) = 10 mm}.

  In the connected state during normal use, the drainage stack assembly 50 is positioned in the axial direction by the lower end insertion port 59 being supported by the receiving portion 36 of the upper receiving port 34 of the drainage pipe joint 30 of the level B. However, in use, for example, when high-temperature drainage is flowed, the drainage stack assembly 50 may be temporarily heated to expand and contract. In the present embodiment, the insertion space E provided in the connection configuration between the drainage stack assembly 50 and the lower end straight pipe portion 40 of the drainage pipe joint 20 absorbs the expansion and contraction associated with the use of such drainage equipment 11. Is also possible. That is, when the drainage stack assembly 50 is extended, the upper receiving port 62 is displaced upward relative to the lower end straight pipe section 40 and the swallowing dimension N is increased, and the drainage stack assembly 50 is contracted. In this case, the upper receiving port 62 is displaced downward relative to the lower end straight pipe portion 40 to reduce the swallowing dimension N and absorb the expansion and contraction. The extension length of the drainage standpipe when using the drainage equipment 11 varies depending on the pipe type, for example, a drainage standpipe having a total length L of 2300 mm made of vinyl chloride that is relatively easy to expand and contract due to changes in the temperature environment. In this case, the extension length when the drainage stack assembly 50 is heated to 50 ° C. is estimated to be about 8 mm. Therefore, it is possible to absorb the expansion and contraction sufficiently by the insertion space E (60 mm). Furthermore, the displacement of the drainage stack is mitigated by following the displacement caused by the vertical movement during the earthquake.

According to the drainage equipment 11 having the above configuration, the following operational effects can be obtained.
First, since the connection structure of the drainage stack assembly 50 and the drainage pipe joint 20 on the upper floor is an exchangeable connection structure, the drainage stand piped between the drainage pipe joints 20 and 30 fixed to the concrete slab CS. The tube assembly 50 can be updated without cutting. An example of the update method is shown below.
That is, first, the drainage stack assembly 50 is displaced upward at least {the stagnation depth D (50 mm) of the upper receiving port 34 + the minimum undercut K1 (6 mm) = 56 mm}. The lower end insertion port 59 of the drainage stack assembly 50 is pulled out. Subsequently, the drainage stack assembly 50 is displaced obliquely downward, and the upper receptacle 62 is pulled out from the lower end straight pipe portion 40 of the drainage pipe joint 20. Thereby, the drainage stack assembly 50 can be removed. Next, the lower end straight pipe portion 40 of the drainage pipe joint 20 is swallowed by the upper receiving port 62 of the new drainage stack assembly 50, and the drainage stack assembly 50 is erected while being displaced obliquely upward. Next, the lower end insertion port 59 of the drainage stack assembly 50 is inserted into the upper receiving port 34 of the drainage pipe joint 30. Thereby, a new drainage stack assembly 50 is piped. Such a drainage facility 11 can update the drainage stack assembly 50 even in a relatively small space such as a pipe shaft provided in the occupying part.

  Next, in the drainage equipment 11 of the present embodiment, in the connection configuration of the drainage stack assembly 50 and the upper level drainage pipe joint 20 that are configured to allow exchange, the drainage stack assembly 50 is expanded and contracted with use. An insertion space E that can be absorbed is secured. For this reason, the elastic body 38 interposed between the lower end insertion port 59 of the drainage stack assembly 50 and the receiving portion 36 of the upper receiving port 34 of the drainage pipe joint 30 is used to expand and contract when the drainage stack assembly 50 is used. Therefore, it is possible to use an annular elastic member having a simpler shape. That is, the elastic body 38 is used in a very simple shape as long as it can prevent the lower end insertion port 59 and the receiving portion 36 from coming into direct contact, and the material is not particularly limited. Absent. The elastic body 38 may be, for example, a rectangular section made of solid rubber and an annular flat packing made of rubber.

The present invention is not limited to the above-described embodiment, and various other embodiments can be considered without departing from the gist of the present invention.
For example, the exchangeable connection configuration is not limited to the connection configuration between the drainage stack assembly 50 and the lower straight pipe portion 40 of the drainage pipe joint 20 on the upper floor, but may be provided in the middle of the drainage stack assembly 50. In other words, when a plurality of standing pipes are connected to form the standing pipe main body 54, a connection configuration in which exchange is possible at any one of the connection places may be adopted. For example, taking the above embodiment as an example, it is possible to provide a receiving port at one of the lower end of the first riser 56 and the upper end of the second riser 58 and connect them in a communicable manner.
In addition, the material of the stand pipe piece constituting the stand pipe main body 54 is not particularly limited. In the above embodiment, the fire-resistant double-layer pipe specification is exemplified, but the resin pipe formed of a resin such as vinyl chloride. Drain pipes such as hard PVC lined steel pipes and stainless steel pipes can be used.
In the above embodiment, the drainage stack assembly 50 is illustrated as an example of the drainage stack. However, the drainage stack main body 54 may be a single tube continuously formed, and the upper receiving port 62 may be set up vertically. It may be formed integrally with the upper part of the tube body 54. For example, a drainage stack in which the upper end portion of the resin tube is expanded to integrally form the receiving port can be used. Further, even when the receptacle socket 60 is used, the receptacle socket is not limited to cast iron but can be made of resin. The receptacle socket 60 may be implemented, for example, as a resin made of hard vinyl chloride or the like and covered with a refractory layer. In this case, the lower connecting mechanism 70 may be a short cylindrical insertion bonding type instead of mechanical connection.
Further, instead of the O-ring 35 attached to the upper receiving port 34, other forms of annular packing such as a tongue-like shape can be used.

  In addition, the drain pipe joint may be a so-called two-body drain pipe joint that can be divided vertically. For example, as shown in FIG. 4, a two-body drainage pipe joint 130 in which the upper receiving port 134 is formed separately from the body portion 132 and is releasably connected can be used. In addition, the part which does not require a change with the said embodiment is shown with the same code | symbol in FIG. 4, and detailed description is abbreviate | omitted. At the lower end of the upper receiving port 134 of the drainage pipe joint 130, a receiving portion 36 is formed on the inner peripheral surface, and a lower end flange portion 134f projecting outward is formed on the outer peripheral surface. An upper end flange portion 132f that projects outward is formed at the upper end of the body portion 132, and the lower end flange portion 134f of the upper receiving port 134 is fastened to the upper end flange portion 132f with the seat packing 131 interposed therebetween. The trunk | drum 132 and the upper receptacle 134 are connected. When such a two-body drainage pipe joint 130 is used, there are two ways to “exchange and remove” the drainage stack assembly 50. As in the above-described embodiment, the first method of exchanging and removing is as follows. First, the drainage stack assembly 50 is displaced upward to pull out the lower end insertion port 59 from the upper receiving port 134, and then the drainage stack assembly 50. The upper receiving port 34 is pulled out from the lower end straight pipe part 40 and is removed by displacing the upper and lower sides obliquely downward. In the second method of exchanging and removing, first, the fastening between the upper end flange portion 132f of the trunk portion 132 of the drainage pipe joint 130 and the lower end flange portion 134f of the upper receiving port 134 is released, and then the drainage stack assembly 50 and the upper Displace the receiving port 134 together upward to secure a clearance, and then displace the drainage stack assembly 50 and the upper receiving port 134 together obliquely downward to pull out the upper receiving port 62 from the lower straight pipe portion 40. It is a method of removing. This second exchange and removal method can be removed even if the upward displacement of the drainage stack assembly 50 is smaller than that of the first exchange and removal method. This can be particularly preferably implemented in, for example, a common part of a building that can secure a technical space for releasing the fastening between the body 132 and the upper receiving port 134 of the drainage pipe joint 130.

  In the two-body drainage pipe joint, the upper body 136 shown in FIG. 5 can be used instead of the upper receptacle 134. In addition, the part which does not require a change with the said embodiment is shown with the same code | symbol in FIG. 5, and detailed description is abbreviate | omitted. The upper body 136 includes a cylindrical portion 138 having a lower end flange portion 138f connectable to the upper end flange portion 132f of the body portion 132 at the lower end, and an upper receiving port 34 is formed at the upper end of the cylindrical portion 138. In the upper body 136, a blade-shaped deceleration guide 138g that decelerates the drainage flowing down to the inner peripheral surface of the cylindrical portion 138 is formed.

BRIEF DESCRIPTION OF THE DRAWINGS It is a side view of the drainage equipment which concerns on embodiment of this invention, (A) is a figure which shows the connection state at the time of normal use, (B) is a figure which shows a mode that a drainage stack assembly is exchanged and removed. is there. It is a longitudinal cross-sectional view of the upper receptacle which concerns on embodiment of this invention. It is a figure which shows the connection mechanism of the drainage pipe joint and drainage stack assembly which concerns on embodiment of this invention in a partial cross section. It is a longitudinal cross-sectional view of the upper receptacle of the drain pipe joint which concerns on the example of a change of this invention. It is a longitudinal cross-sectional view which shows the upper trunk | drum of the drain pipe joint which concerns on the example of a change of this invention.

Explanation of symbols

11 Drainage equipment 20, 30 Drainage pipe joint 35 O-ring 36 Receiving part 38 Elastic body 40 Lower end straight pipe part (the other tubular structure)
50 Drainage stack assembly (one tubular structure)
54 Standing Pipe Body 60 Receiving Socket 62 Upper Receiving Port 130 Drainage Pipe Joint 132 Body 134 Upper Receiving Port 136 Upper Body CS Concrete Slab E Insertion Room

Claims (2)

A drainage pipe joint that passes through the concrete slab separating the upper floor and the lower floor and is fixed to each floor, and a drainage standpipe that is piped between the upper floor drainage pipe joint and the lower floor drainage pipe joint Drainage equipment,
The drainage stack is inserted and connected at the lower end to an upper receiving port formed in the upper part of the drainage pipe joint on the lower floor, and connected at the upper end connected to the drainage pipe joint on the upper floor or at an intermediate position in the axial direction. And the exchangeable connection configuration is configured such that a receiving opening is provided at an end of one of the two tubular structures to be connected. And the insertion connection is maintained in a state in which the receiving port and the other tubular structure can be inserted deeper, and the drainage stack can be removed by inserting the receiving port deeper into the other tubular structure. And
A receiving portion that supports a lower end surface of the drainage stack is formed at the back of the upper receiving port of the drainage pipe joint, and an elastic body is interposed between the receiving portion and the drainage stack, A drainage facility characterized in that an annular packing is interposed between the inner peripheral surface of the upper receptacle and the outer peripheral surface of the drainage stack, and the elastic body and the annular packing are separate members. The drainage facility according to claim 1,
The annular packing is an O-ring, and is held in a groove formed on an inner peripheral surface of an upper receiving port of the drainage pipe joint.

Images